WO2020119640A1

WO2020119640A1 - User device and method thereof, and base station and method thereof

Info

Publication number: WO2020119640A1
Application number: PCT/CN2019/124034
Authority: WO
Inventors: 肖芳英; 刘仁茂
Original assignee: 夏普株式会社; 肖芳英
Priority date: 2018-12-11
Filing date: 2019-12-09
Publication date: 2020-06-18
Also published as: CN111314970A; BR112021010897A2; EP3902370A4; US11963257B2; EP3902370A1; BR112021010897A8; US20220070969A1

Abstract

Provided in the present invention are a user device and a method thereof, and a base station and a method thereof. The method in the user device comprises: receiving a handover MAC CE from a base station and, on the basis of the handover MAC CE, activating and/or deactivating an RLC entity and/or a logical channel associated with a bearer supporting PDCP duplication.

Description

User equipment and its method, base station and its method

Technical field

The present disclosure relates to the technical field of wireless communication, and more specifically, the present disclosure relates to user equipment and its method, base station and its method.

Background technique

In September 2018, at the 3rd Generation Partnership Project (3GPP) RAN#81 plenary meeting, Nokia proposed a research project on 5G (or NR) Industrial Internet of Things (IIOT) (see Non-patent literature: RP-182090: Revised SID: Study on NR Industrial (Internet) of Things (IoT)) and approved. One of the goals of this research project is to improve the reliability of data transmission and reduce the delay of data transmission through data duplication, including: (1) resource-efficient PDCP repetition, such as avoiding unnecessary repetitive transmission; (2) Using dual connectivity or carrier aggregation to achieve more than two repetitions of PDCP.

In Release 15, up to two RLC entities can be configured for PDCP repeat bearers. The initial state of the bearer configured with PDCP repetition is to indicate whether to activate the PDCP repetition function at the beginning through pdcp-Duplication cells (see 3GPP TS38.331 for the specific description of the cells). In carrier aggregation, for a bearer whose initial PDCP repetition function is not activated, its data is sent through the logical channel indicated by the primaryPath information element (see 3GPP TS38.331 for a detailed description of the information element). In dual connectivity, for a bearer whose initial PDCP repetition function is not activated, it is determined according to the amount of data to be sent whether the data is sent through the logical channel indicated by the primaryPath cell (see the 3GPP TS38.331 for a detailed description of the cell) or Use separate bearer to send.

In NRIIOT, in order to achieve the goal of using dual connectivity or carrier aggregation to achieve more than two times of PDCP duplication, some manufacturers have proposed to configure multiple RLC entities for PDCP duplicate bearers, but only activate a few RLC entities at a time. the way. If multiple (more than two) RLC entities can be configured for PDCP repeated bearers, how to dynamically switch RLC entities used to transmit PDCP PDUs for bearers configured with multiple RLC entities is a problem to be solved.

Summary of the invention

In order to solve the above problems in the prior art, the present invention provides a method in user equipment, a method in user equipment, a method in a base station, and a base station.

According to a first aspect of the present invention, there is provided a method in user equipment comprising: receiving a handover MAC from a base station; and based on the handover MAC, activating and/or deactivating RLC associated with a bearer supporting the PDCP duplication Physical and/or logical channels.

In the above method, the handover MAC includes: a first domain for indicating a bearer supporting the PDCP duplication, and a radio link control RLC entity or logical channel associated with the bearer or a PDCP entity of the bearer Domain 2.

In the above method, if the first field is set to Di, Di corresponds to the radio bearer i, where i is the corresponding sequence number according to the ascending or descending order of the radio bearer identifier of the radio bearer configured with the PDCP repeat The radio bearer includes a data radio bearer DRB and/or a signaling radio bearer SRB. If the second domain is set to Lij, then Lij means to activate or deactivate the jth RLC of the radio bearer corresponding to the first domain Di Entity and/or logical channel, where j is the sequence number of the RLC entity and/or logical channel associated with the radio bearer corresponding to the first domain Di in ascending or descending order according to the logical channel identifier, according to the Value to determine whether the RLC entity and/or the logical channel corresponding to the second domain Lij is activated or deactivated.

In the above method, when the SRB supports dynamic switching of RLC entities or logical channels for data transmission, the DRB and the SRB use different switching MACs.

In the above method, the handover MAC also includes a third field. When the SRB supports dynamic handover of RLC entities or logical channels used for data transmission, the third field indicates that the corresponding handover MAC is used for all The SRB is also used for the DRB.

In the above method, when the handover MAC and CE are used to activate or deactivate the PDCP repetition, according to the value of the first domain Di, it is determined whether the radio bearer i corresponding to the first domain Di is active State or deactivated state.

In the above method, the RRC message includes group information, and the group information is used to indicate an RLC entity group or logical channel group or RLC bearer group that can be used after the PDCP is repeatedly activated.

According to a second aspect of the present invention, there is provided a user equipment, including: a processor; and a memory, storing instructions; wherein the instructions execute the method in the user equipment according to the context when executed by the processor .

According to a third aspect of the present invention, there is provided a method in a base station, comprising: generating an RRC message, the RRC message containing information instructing a user equipment UE to perform a packet data aggregation protocol PDCP repeated activation configuration; and sending the RRC message Send to the UE; and generate a handover MAC CE and send to the UE, indicating the activation and/or deactivation of the RLC entity and/or logical channel associated with the bearer supporting the PDCP through the handover MAC CE.

According to a fourth aspect of the present invention, there is provided a base station, including: a processor; and a memory, storing instructions; wherein the instructions execute the method in the base station according to the context when executed by the processor.

BRIEF DESCRIPTION

The above and other features of the present disclosure will become more apparent through the following detailed description in conjunction with the drawings, in which:

FIG. 1 shows a flowchart of a method 100 in a user equipment UE based on an embodiment of the present disclosure.

2 shows a block diagram of user equipment 20 based on an embodiment of the present disclosure.

FIG. 3 shows a flowchart of a method 300 in a base station based on an embodiment of the present disclosure.

FIG. 4 shows a block diagram of a base station 40 based on an embodiment of the present disclosure.

5 shows a schematic diagram of MAC switching CE.

detailed description

The disclosure will be described in detail below with reference to the drawings and specific embodiments. It should be noted that the present disclosure should not be limited to the specific embodiments described below. In addition, for the sake of simplicity, a detailed description of well-known technologies that are not directly related to the present disclosure is omitted to prevent confusion in understanding the present disclosure.

The following describes some terms related to the present disclosure. Unless otherwise specified, the terms related to the present disclosure are defined here. The terminology given in this disclosure may adopt different nomenclature in NR, LTE, and eLTE, but the unified terminology used in this disclosure may be replaced with the terminology adopted in the corresponding system when applied to a specific system.

RRC: Radio Resource Control, radio resource control.

PDCP: Packet Data Convergence Protocol, packet data aggregation protocol.

RLC: Radio Link Control, wireless link control. The transmission mode of the RLC entity can be configured as one of the transparent transmission mode TM, the unacknowledged mode UM or the confirmed mode AM.

MAC: Medium Access Control, media access control.

MAC CE: MAC Control Element, MAC control element.

PDU: Protocol Data Unit, protocol data unit.

SDU: Service Data Unit, service data unit.

In the present disclosure, data received from or sent to the upper layer is called SDU, and data sent to or received from the lower layer is called PDU. For example, the data received by the PDCP entity from the upper layer or the data sent to the upper layer is called PDCP SDU; the data received by the PDCP entity from the RLC entity or the data sent to the RLC entity is called PDCP PDU (that is, RLC SDU).

PDCP-Config cell: The cell PDCP-Config is used to set configurable PDCP parameters for signaling bearers and data bearers.

RLC-BearerConfig information element: The information element RLC-BearerConfig is used to configure the association of the RLC entity, the corresponding logical channel in the MAC and the PDCP entity (bearer of the service) (used to configure RLC entity, a correspondence channel, logical channel in MAC) and the linking to PDCP entity (served radio bearer)).

Master base station: Master eNB or Master gNB, denoted as MeNB (base station corresponding to E-UTRAN or LTE or eLTE) or MgNB (base station corresponding to 5G-RAN or NR). In dual connectivity, at least terminate at the eNB that handles the interaction between the UE and the core network of the control node mobility management entity (can be referred to as S1-MME); or at least terminate at the gNB of NG-C, which is NG -Control plane interface of RAN and 5GC.

Secondary base station: Secondary eNB or Secondary gNB, denoted as SeNB (base station corresponding to E-UTRAN or LTE or eLTE) or SgNB (base station corresponding to 5G-RAN or NR). In dual connectivity, a base station that is not the primary base station but provides additional wireless resources for the UE.

Primary cell: Primary Cell, PCell. The cell operating on the primary frequency may be the cell on which the UE performs the initial connection establishment process or initiates the connection reestablishment process or is designated as the primary cell during the handover process. The cell described in this disclosure may also be referred to as a carrier or a set of beams.

Primary and secondary cells: Primary Secondary Cell, PSCell. In performing the process of changing the SCG, the UE is instructed to use the SCG cell for performing random access.

Secondary cell: Secondary Cell, SCell. A cell operating on a secondary frequency, which can be configured after RRC connection establishment and can be used to provide additional radio resources.

Cell group: Cell, Group, CG. In dual connection or multi-connection, a group of serving cells or carriers associated with the primary or secondary base station may be MCG or SCG.

Main cell group: Master Cell, MCG. For UEs that are not configured for dual connectivity, the MCG is composed of all serving cells; for UEs that are configured for dual connectivity, the MCG is composed of a subset of serving cells (that is, a group of serving cells associated with the primary base station), which includes PCell and 0 Or one or more SCells.

Secondary cell group: Secondary Cell Group, SCG. In dual connectivity, a group of serving cells associated with SeNB or SgNB. The SCG may contain one PSCell and one or more SCells.

Dual connectivity: dual Connectivity, DC.

DRB: Data Radio Bearer carrying user plane data, data wireless bearer carrying user plane data or data wireless bearer for short.

SRB: Signaling Radio Bearer, signaling radio bearer.

Separate SRB: split SRB.

Unless otherwise stated, the bearer or radio bearer in the present disclosure may be: SRB, DRB, split DRB (for example: MCG split DRB or SCG split DRB), split SRB (for example MCG split SRB or SCG split SRB).

PDCP repetition: It can also be called repetition or group repetition or data repetition. SRB, DRB, separated SRB, and separated DRB can be configured with PDCP repetition. When the radio bearer is configured with PDCP repetition, a secondary RLC entity and a secondary logical channel are added to the radio bearer to process the repeated PDCP PDU. PDCP duplication means that the same PDCP PDU is sent two or more times, and the two or more PDCP PDUs are sent through RLC entities and/or logical channels associated with different carriers or carrier groups. In the dual connection mode, the RLC entities and/or logical channels configured with PDCP repeated radio bearers belong to different MAC entities.

Repeated activation/deactivation MAC CE: Duplication Activation/Deactivation MAC CE, used to activate or deactivate the radio bearer PDCP repetition.

Total amount of data: the total amount of PDCP data and the associated two or more RLC (or activated RLC) data (the amount of RLC data waiting for initial transmission) (the total amount of PDCP data data volume and RLC data volume pending for initial transmission in the activated RLC entities).

Primary path: Primary path. In carrier aggregation, when PDCP is repeatedly deactivated, the PDCP entity sends PDCP PDUs to the primary path. In dual connectivity, when PDCP is repeatedly deactivated, if the total amount of data is less than the data separation threshold, the PDCP entity sends the PDCP PDU to the main path.

Secondary path: secondary path, in carrier aggregation and dual connection, when PDCP is repeatedly activated, the RLC entity and/or logical channel and/or RLC bearer used to send the PDCP PDU. Specifically, when the PDCP is repeatedly activated, the PDCP entity copies the PDCP PDU and sends it to the activated RLC entity and/or logical channel and or RLC bearer (which may also be referred to as primary path and secondary path). The embodiments in the present disclosure specifically describe those RLC entities and/or logical channels and/or RLC bearers that are considered activated, in which the activated RLC entities and/or logical channels and/or RLC bearers, except the main path The external RLC entities and/or logical channels and/or RLC bearers may be called secondary paths.

Hereinafter, the method in the user equipment UE in the present disclosure will be described, and specifically, the control method involved in the PDCP duplication carried in the user equipment UE will be described. As an example, FIG. 1 shows a flowchart of a method 100 in a user equipment UE based on an embodiment of the present disclosure.

In step S101, the user equipment UE receives the handover MAC from the base station CE.

In step S102, the user equipment UE activates and/or deactivates the RLC entity and/or logical channel associated with the bearer supporting PDCP duplication based on the handover MAC CE. In other words, the user equipment UE switches the RLC entity and/or logical channel used to transmit the PDCP PDU among RLC entities and/or logical channels that support PDCP repetition bearers based on the handover MAC.

The above-mentioned handover MAC may include: a first domain for indicating a bearer supporting PDCP duplication, and a second domain of the RLC entity or logical channel associated with the bearer or the PDCP entity of the bearer.

In the above handover MAC CE, if the first field is set to Di, Di corresponds to the radio bearer i, where i is arranged in the ascending or descending order of the radio bearer identifiers of the radio bearers configured with the PDCP duplication The serial number of the radio bearer includes a data radio bearer DRB and/or a signaling radio bearer SRB.

In the above handover MAC CE, if the second domain is set to Lij, then Lij means to activate or deactivate the jth RLC entity and/or logical channel of the radio bearer corresponding to the first domain Di, where j is all The sequence numbers of the RLC entities and/or logical channels associated with the radio bearer corresponding to the first domain Di are arranged in ascending or descending order according to the logical channel identifier.

In the above method of the user equipment UE, the RLC entity and/or the logical channel corresponding to the second domain Lij may be activated or deactivated according to the value of the second domain Lij.

Regarding the above "switching MAC" CE is limited to the above content, it can be appropriately set with reference to the content of the embodiments described below.

In addition, FIG. 2 shows a block diagram of the user equipment 20 according to an embodiment of the present disclosure. As shown in FIG. 2, the user equipment 20 includes a processor 201 and a memory 202. The processor 201 may include, for example, a microprocessor, a microcontroller, an embedded processor, and the like. The memory 202 may include, for example, volatile memory (such as random access memory RAM), hard disk drive (HDD), non-volatile memory (such as flash memory), or other memory systems. The memory 202 stores program instructions. When the instruction is executed by the processor 201, the above method in the user equipment described in detail in the present disclosure may be executed.

Furthermore, as an example, FIG. 3 shows a flowchart of a method 300 in a base station based on an embodiment of the present disclosure.

In step S301, the base station generates an RRC message, the RRC message includes information instructing the user equipment UE to perform the repeated activation configuration of the packet data aggregation protocol PDCP.

In step S302, the base station sends the RRC message generated above to the user equipment UE.

In step S303, the base station generates a handover MAC and sends it to the user equipment UE, and indicates the activation and/or deactivation of the RLC entity and/or logical channel associated with the bearer supporting the PDCP through the handover MAC.

Regarding the specific setting contents of the above "switching MAC" CE, reference may be made to the contents of the embodiments described below to make appropriate settings.

In addition, FIG. 4 shows a block diagram of the base station 40 according to an embodiment of the present disclosure. As shown in FIG. 4, the base station 40 includes a processor 401 and a memory 402. As mentioned above, the base station 40 in the present disclosure may be any type of base station, including but not limited to: Node B, enhanced base station eNB, or 5G communication system base station gNB, or micro base station, pico base station, macro base station, home base station Wait. The processor 401 may include, for example, a microprocessor, a microcontroller, an embedded processor, or the like. The memory 402 may include, for example, volatile memory (such as random access memory RAM), hard disk drive (HDD), non-volatile memory (such as flash memory), or other memory systems. The memory 402 stores program instructions. When the instruction is executed by the processor 401, the above method in the base station described in detail in this disclosure can be executed.

Hereinafter, specific examples and embodiments related to the present disclosure will be described in detail. In addition, as described above, the examples and embodiments described in the present disclosure are exemplary explanations for easy understanding of the present invention, and do not limit the present invention.

First, the following describes an embodiment in which a base station configures a user equipment to support a PDCP repeated bearer and sets its initial state.

The user equipment receives an RRC message from the base station (the RRC message in the embodiment of the present disclosure may be an RRC reconfiguration message), and the message includes an activation indicator (recorded as a first indicator, for example, represented by a cell activatedPath) . The activation indicator may be used to indicate the RLC entity and/or logical channel and/or RLC bearer in the activated state; or, the activation indicator may be used to indicate the RLC in the activated state when the PDCP is repeatedly activated or deactivated Entity and/or logical channel and/or RLC bearer; or, the activation indicator may be used to indicate the RLC entity and/or logical channel and/or RLC bearer in the activated state in the initial state; or, the activation indicator may be available To indicate whether the corresponding RLC entity and/or logical channel and/or RLC bearer are in an activated state.

Optionally, the RRC message further includes an information element (denoted as maxNrofActivatedLCH) for indicating the maximum number of RLC entities and/or logical channels and/or RLC bearers that can be activated when the PDCP is repeatedly activated. The value of the information element is an integer and does not exceed the maximum RLC entity and/or logical channel and/or RLC bearer number or maximum value of the logical channel identifier maxLC-ID that can be configured for one bearer.

Optionally, the RRC message also includes a cell (denoted as releaseAllowedServingCells) used to indicate whether to deactivate the restriction of the serving cell after repeated deactivation of PDCP (the restriction of the serving cell can be configured through the allowedServingCells of the cell, if the cell appears ), the UL MAC SDU corresponding to the logical channel can only be mapped to the serving cell in the cell list specified by the cell). In other words, after the deactivation of PDCP is repeated, the uplink UL MAC SDU from the logical channel can be mapped to any (or all) serving cells configured in the cell group. The information element can be configured in PDCP-config, and is applied to all RLC entities or logical channels at this time. The information element may also be configured in LogicalChannelConfig, at this time it only applies to the corresponding logical channel or the RLC entity associated with the logical channel. For example, if the value of the cell is 1 or TRUE or the cell appears, it means that after the deactivation of PDCP is repeated, the serving cell restriction is canceled.

Optionally, in carrier aggregation, if the number of activated RLC entities and/or logical channels and/or RLC bearers indicated by the activation indication identifier exceeds two, PDCP is repeatedly activated. The PDCP entity will copy the PDCP PDU and send it to its associated activated RLC entity and/or logical channel and/or RLC bearer. If there is only one activated RLC entity and/or logical channel and/or RLC bearer indicated by the activation indicator, the PDCP is repeatedly deactivated. The PDCP entity sends the PDCP PDU to the activated RLC entity and/or logical channel and/or RLC bearer.

Optionally, the RRC message also contains a PDCP repetition indicator (denoted as pdcp-Duplication), which is used to indicate whether the uplink repetition status is configured and activated when this cell is received. In carrier aggregation, if the PDCP repeat indication flag takes the value TRUE, the PDCP entity copies the PDCP PDU and sends it to multiple activated RLC entities. If the PDCP repeat indication flag takes the value FALSE ), the PDCP entity sends the PDCP PDU to the activated RLC entity (or main path) or the PDCP entity sends the PDCP PDU to an activated RLC entity (the RLC entity is the least correlated among the activated RLC entities ( Or smaller or largest or larger) RLC entity of the logical channel identified by the logical channel). If the value of the PDCP repeated indication flag is false, and no main path is configured in the RRC message, only one RLC entity and/or logical channel and/or RLC bearer is activated (that is, its activation indication flag is TRUE). In dual connectivity, if the pdcp-Duplication value is TRUE, the PDCP entity copies the PDCP PDU and sends it to its associated multiple activated RLC entities and/or logical channels and/or RLC bearers. If the value of pdcp-Duplication is false (FALSE), the PDCP entity sends the PDCP PDU according to the separate bearer data transmission method. Specifically, in this case, the RRC message also includes the configuration of the main path and/or the data separation threshold (referred to as ul-DataSplitThreshold in this disclosure). If the total amount of data is equal to or exceeds the data separation threshold, the PDCP entity will The PDU is sent to one of the two or more RLC entities that are activated. If the total amount of data is less than the data separation threshold, the PDCP entity sends the PDCP PDU to the RLC entity specified by the main path. The value of the main path may be a cell group identifier or MCG or SCG. When the total amount of data is less than the data separation threshold, the PDCP entity sends the PDCP PDU to the cell that is activated and belongs to (or is associated with) the main path. The RLC entity and/or logical channel and/or RLC bearer of the group.

Optionally, in carrier aggregation, for the PDCP control PDU, when the PDCP is repeatedly activated, the PDCP control PDU may be predefined to be sent to the logic that is activated and associated with the smallest (or smaller or larger or larger) logical channel identifier The RLC entity of the channel. In other words, at this time, the RLC entity that is activated and associated with the logical channel with the smallest (or smaller or largest or larger) logical channel identifier is used as the main path.

Example one

The activation indication identifier may be included in the PDCP-config to indicate that one or more RLC entities or logical channels or RLC bearers of a certain cell group are activated. The activation indication identifier (denoted as ActivatedPath) may include a cell group indication identifier (eg, represented by a cell group) and/or a logical channel indication identifier (eg, represented by a logicalHChannelList). The cell group indicator is used to indicate the cell group. The cell group identifier (denoted as CellGroupId) of the master cell group (MCG) may be 0, and other values indicate the secondary cell group. The logical channel indication identifier is used to indicate the activated RLC entity (or its associated logical channel) and/or logical channel and/or RLC bearer, and its value may be a logical channel identifier LogicalChannelIdentity (that is, LCH ID) list or a Bitmap, each bit in the bitmap corresponds to a logical channel, and the logical channel identifier of the logical channel associated with the bearer or its PDCP entity may be corresponding to each bitmap in order from large to small or from small to large. One bit (from left to right). For example, the RLC entity and/or logical channel and/or RLC bearer corresponding to the bit with a value of 0 in the bitmap is deactivated (or activated); the RLC entity and/or corresponding to the bit with a value of 1 in the bitmap The logical channel and/or RLC bearer is activated (or deactivated). In carrier aggregation, the activation indicator may only include the logical channel indicator. In dual connectivity, the number of elements in the logical channel identification list or the length of the bitmap can be set to the maximum number of configurable RLC entities or the maximum number of logical channels that support PDCP repetition bearers minus 1.

Example 2

The activation indication identifier may be included in the PDCP-config, and the activation indication identifier has two information elements, one information element (denoted as MCGActivatedPath) is used to indicate the activated RLC entity and/or logical channel in the primary cell group MCG And/or RLC bearer. Another information element (denoted as SCGActivatedPath) is used to indicate the activated RLC entity and/or logical channel and/or RLC bearer in the secondary cell group SCG. The value of the MCGActivatedPath (or SCGActivatedPath) may be a logical channel identifier LogicalChannelIdentity (that is, LCH ID) list or a bitmap, each bit in the bitmap corresponds to a logical channel, and may be associated with the bearer or its PDCP entity and The logical channel identifier of the logical channel located in the MCG (or SCG) corresponds to each bit in the bitmap (from left to right) in order from large to small or small to large. For example, the RLC entity and/or logical channel and/or RLC bearer corresponding to the bit with a value of 0 in the bitmap is deactivated (or activated); the RLC entity and/or corresponding to the bit with a value of 1 in the bitmap The logical channel and/or RLC bearer is activated (or deactivated). In dual connectivity, the number of elements in the logical channel identification list or the length of the bitmap can be set to the maximum number of configurable RLC entities or the maximum number of logical channels that support PDCP repetition bearers minus 1.

Optionally, the MCGActivatedPath and/or SCGActivatedPath include a main path indication information element for indicating the corresponding cell group or the RLC entity (or logical channel) belonging to the corresponding cell group or the activated RLC entity belonging to the corresponding cell group (Or logical channel) whether it is the main path. If the primary path indication cell value is TRUE or 1 or appears, the corresponding cell group or RLC entity (or logical channel) belonging to the corresponding cell group or the activated RLC entity belonging to the corresponding cell group ( Or logical channel) as the main path, otherwise not as the main path, and vice versa.

Example Three

The activation indication identifier (denoted as initialActivated) may be included in RLC-BearerConfig to indicate whether the corresponding RLC entity and/or logical channel and/or RLC bearer are in the activated state, or to indicate the corresponding RLC entity and/or Or whether the logical channel and/or RLC bearer is in an active state when receiving this cell.

If the activation indication flag initialActivated takes the value TRUE or 1 or the flag appears, it means that the corresponding RLC entity and/or logical channel and/or RLC bearer are in the activated state; if the activation indication flag initialActivated takes the value FALSE or 0 or the If the identifier does not appear, it indicates that the corresponding RLC entity and/or logical channel and/or RLC bearer are in a deactivated state. vice versa.

Optionally, the RLC-BearerConfig can also contain the main path cell, the value of which is true (TRUE) or false (FALSE), or 0 or 1, or based on its presence or absence to determine, if the main path is trusted If the value of the element is TRUE or 1, or appears, the associated RLC entity is used as the main path; otherwise, it is not used as the main path. vice versa.

Optionally, in the initial state of carrier aggregation, if PDCP is repeatedly deactivated (for example, pdcp-Duplication does not appear or is set to False), only one RLC entity is in the activated state, that is, only one RLC entity's activation indicator identifies initialActivated The value is TRUE or 1 or the logo appears; if PDCP is repeatedly activated, at least two RLC entities are in the activated state, that is, the activation indication flag of at least two RLC entities is initialActivated The value is TRUE or 1 or the logo appears .

Example 4

In carrier aggregation, in the initial state, if the PDCP is repeatedly activated, the PDCP entity sends the PDCP PDU to the RLC entity (here two with the smallest and the second smallest (or the largest and the next largest) logical channel identifier). For example, if there are more than one, the analogy follows). If the PDCP is repeatedly deactivated, the PDCP entity sends the PDCP PDU to the RLC entity associated with the logical channel with the smallest (or largest) logical channel identification.

In dual connectivity, in the initial state, if the PDCP is repeatedly activated, the PDCP entity sends the PDCP PDU to the RLC entity associated with the logical channel with the smallest (or largest) logical channel identifier in each cell group. If PDCP is repeatedly deactivated and the total amount of data is greater than or equal to the data separation threshold, the PDCP entity sends the PDCP PDU to one of the RLC entities in the two cell groups that are respectively associated with the logical channel with the smallest (or largest) logical channel identifier RLC entity. If PDCP is repeatedly deactivated and the total amount of data is less than the data separation threshold, the PDCP entity sends the PDCP PDU to the main path. The main path may configure a cell group to which the main path belongs through RRC, and then predefine an RLC entity associated with a logical channel having a minimum (or maximum) logical channel identifier in the cell group as the main path.

Alternatively, the initial state of PDCP repetition is always deactivated. In carrier aggregation, the PDCP entity sends the PDCP PDU to the RLC entity associated with the logical channel with the smallest (or largest) logical channel identification. In dual connectivity, if the total amount of data is greater than or equal to the data separation threshold, the PDCP entity sends the PDCP PDU to one of the RLC entities in the two cell groups that is associated with the logical channel with the smallest (or largest) logical channel identifier. entity. If the total amount of data is less than the data separation threshold, the PDCP entity sends the PDCP PDU to the main path. The main path may configure a cell group to which the main path belongs through RRC, and then predefine an RLC entity associated with a logical channel having a minimum (or maximum) logical channel identifier in the cell group as the main path.

Example 5

The activation indicator may be included in the PDCP-config, and the activation indicator includes two cells, namely a primary path indicator (remembered as PrimaryPath) and a secondary path indicator (remembered as SecondaryPath). The main path indication identifier may further include two indication identifiers, one is a cell group identifier (ie cell ID) used to indicate the cell group of the main path (or the main RLC entity) and/or a logical channel indicating the main path Logical channel identification (or logical channel identification list or bitmap); the secondary path indication identification may also include two indication identifications, one is a cell group identification used to indicate the cell group of the secondary path and/or used to indicate the secondary path The logical channel identifier (or logical channel identifier list or bitmap) of the logical channel of Each bit in the bitmap corresponds to a logical channel, which can be from large to small or from small to large according to the logical channel ID of the logical channel associated with the bearer or its PDCP entity and located in the cell group indicated by the cell group ID The order of in turn corresponds to each bit in the bitmap (from left to right). For example, the RLC entity and/or logical channel and/or RLC bearer corresponding to the bit with a value of 0 in the bitmap is deactivated (or activated); the RLC entity and/or corresponding to the bit with a value of 1 in the bitmap The logical channel and/or RLC bearer is activated (or deactivated). In dual connectivity, the number of elements in the logical channel identification list or the length of the bitmap can be set to the maximum number of configurable RLC entities or the maximum number of logical channels that support PDCP repetition bearers minus 1. After the deactivation of PDCP is repeated, if the main path contains multiple logical channels or RLC entities or RLC logical channels, the logical channel or RLC entity or RLC logical channel with the maximum or minimum logical channel identifier can be pre-defined as the PDCP PDU that is sent Logical channel or RLC entity or RLC logical channel (that is, the PDCP entity sends PDCP PDUs to the logical channel or RLC entity or RLC logical channel), or through RRC configuration (for example, indicated by an indicator) one of the logical channels or RLC Entity or RLC logical channel is used to send PDCP PDU.

It should be noted that, in the present disclosure, corresponding to PDCP repetition based on carrier aggregation, since the RLC entity or logical channel associated with the same carrier (or PDCP entity) supporting PDCP repetition belongs to a cell group, the activation indication flag The cell group identifier may not be included. In other words, the activation indicator only includes logical channel indicator information.

The following describes an embodiment of dynamically switching RLC entities when PDCP is repeatedly activated.

Embodiment 6: MAC switching CE

The user equipment UE receives an RRC message from a base station, where the RRC message configures multiple RLC entities and/or logical channels for a bearer that supports PDCP repetition.

The user equipment receives the handover MAC CE from the base station, which is used to activate and/or deactivate the RLC entity and/or logical channel associated with the bearer supporting PDCP duplication. The handover MAC includes a domain for indicating a bearer supporting PDCP duplication (can be denoted as Di) and a domain of an RLC entity or logical channel associated with the bearer (or PDCP entity of the bearer) (can be denoted as Lij) ). The handover MAC CE is related to the MAC entity. The handover MAC from a certain MAC entity only indicates the RLC entity (or logical channel) associated with this MAC entity and its corresponding DRB or SRB that supports repetition.

Fig. 5 shows a schematic diagram of MAC switching CE. In FIG. 5, Di corresponds to DRBi or SRBi, where i is the corresponding sequence number according to the ascending or descending order of the DRB identifier (or SRB identifier) of the DRB (or SRB) configured with PDCP duplication, and the DRB (or SRB) is associated The RLC entity (or associated RLC part) is located in this MAC entity. SRB can also support dynamic switching of RLC entities or logical channels for data transmission. If the SRB supports dynamic switching of RLC entities or logical channels used for data transmission, SRB and DRB can use different switching MACs; or CE includes a field in the switching MAC to indicate whether the corresponding switching MAC is used for SRB or CE DRB (based on the different values of the domain to distinguish between MAC used for SRB and CE used for DRB), for example, if the value of the domain is 0 (or 1), the corresponding switch MAC Used for SRB (or DRB), that is, Di corresponds to SRB (or DRB), and vice versa; or it is mapped to Di in the manner of SRB before DRB or DRB before SRB. At the same time, each SRB (or DRB) can be mapped to the Di in the MAC switching CE according to the order of the bearer ID from small to large or from large to small (it can be mapped from left to right or right to left, for example D0 corresponds to the DRB or SRB with the smallest or largest bearer identifier).

In FIG. 5, the field Lij is used to indicate the activation or deactivation of the j-th RLC entity and/or logical channel of the bearer corresponding to Di. j is the RLC entity and/or logical channel of the bearer corresponding to Di associated with this MAC entity according to the logic The channel numbers are listed in ascending or descending order. If the value of the field is 0, the corresponding RLC entity and/or logical channel is deactivated, and if the value of the field is 1, the corresponding RLC entity and/or logical channel is activated. vice versa.

Preferably, when Di=0, the corresponding Lij field is not included in the handover MAC CE. Alternatively, when Di=0, at most one Lij field takes the value 1. Alternatively, when Di=0, the corresponding Lij field is not included in the handover MAC CE, but the handover MAC CE contains a field used to indicate the deactivated RLC entity and/or logical channel that are in the activated state after PDCP repetition, The value of the domain may be the logical channel identifier of the activated logical channel or the logical channel identifier of the logical channel associated with the activated RLC entity, or the value of the domain of 0 or 1 indicates that deactivation is not associated with The RLC entity other than the RLC entity of the logical channel identified by the smallest logical channel, or the value of the field being 0 or 1 indicates that other RLC entities other than the RLC entity associated with the logical channel having the largest logical channel identifier are deactivated.

If the MAC switching CE is also used to activate or deactivate the PDCP repetition, Di is used to indicate whether the PDCP repetition of SRBi or DRBi is in the activated or deactivated state. Di=0 indicates that the SRBi or DRBi PDCP is repeatedly deactivated, and Di=1 indicates that the SRBi or DRBi PDCP is repeatedly activated. vice versa. Optionally, Di is also used to indicate whether Lij appears in the handover MAC CE. When Di=0, the corresponding Lij field is not included in the handover MAC CE. When Di=1, the corresponding Lij field Included in handover MAC CE.

If the handover MAC CE is not used for repeated activation/deactivation, the handover MAC CE may contain only the logical channel corresponding to the activated bearer (may be only the logical channel belonging to this MAC entity). At this time, the Di domain in FIG. 5 may not be carried, and the switching MAC carries only the Lij domain corresponding to the activated bearers. The arrangement of the Lij field is the same as that in FIG. 5, and it can be arranged in ascending or descending order according to the size of its corresponding Di bearer identification, and the Lij corresponding to each activated bearer can be arranged in ascending or descending order according to the size of the logical channel identification.

Alternatively, the switching MAC may also indicate only one bearer switching RLC entity and/or logical channel at a time. At this time, the switching MAC carries the bearer identifier and the Lij field (used to indicate the logical channel where the corresponding bearer is activated).

After receiving the MAC switching CE, the user equipment performs one of the following operations:

1) If the PDCP repetition is deactivated (Di field is 0), instruct the upper layer to deactivate the PDCP repetition of the corresponding bearer.

2) If the PDCP is repeatedly activated (Di field is 1), this case indicates that the RLC entity or logical channel is switched, then the upper layer is instructed to switch the RLC entity and/or logical channel; or the logical channel identifier or the activated logical channel identifier of the upper layer is indicated The logical channel identifier of the logical channel associated with the RLC entity indicates the logical layer identifier of the upper layer or the RLC entity indicating that the upper layer is activated. Optionally, it also instructs the upper layer to activate the PDCP repetition of the corresponding bearer.

3) If switching the RLC entity, instruct the upper layer (PDCP entity) corresponding to the bearer identifier to switch the logical channel (or RLC entity) or indicate the logical channel identifier (or its corresponding RLC entity) to the upper layer.

Embodiment 7: RRC configuration + handover MAC CE

The user equipment receives an RRC message (such as an RRC reconfiguration message) from the base station, where the message contains an RLC entity group or logical channel group or RLC bearer group that can be used after indicating that PDCP is repeatedly activated. Specifically, the RLC entities and/or logical channels associated with the same bearer are divided into several groups, and each group can be configured with a group number in the RRC message. For example, a group number indication indicator indicates a group number, and another group indication indicator indicates an RLC entity or logical channel included in the group. The logical channel identification list mode or the bitmap mode may be used to indicate grouping. When grouping according to the bitmap, each bit in the bitmap corresponds to each RLC entity and/or logical channel associated with this bearer (can be mapped in order from small to large or large to small), which is 1 in the bitmap The RLC entities and/or logical channels corresponding to the bits are divided into the same group. Alternatively, the RLC entities and/or logical channel groups are numbered according to the order in which the RLC entities and/or logical channels are grouped, the first group number is 0 (or 1) and the second group number is 1 (or 2 ), and so on.

The user receives the handover MAC from the base station CE. The switching MAC is used to instruct the PDCP repeated RLC entity or logical channel to switch to the RLC entity or logical channel generally indicated by the MAC. Preferably, the field of the MAC switching CE is the RLC entity and/or logical channel group number. Alternatively, the switching MAC CE is a bitmap, and the bits in the bitmap correspond one by one in ascending or descending order according to the packet number, and the bit (or bit) value in the bitmap is 1 indicating that the RLC entity in the packet is activated and /Or logical channel, a bit (or bit) in the bitmap with a value of 0 means deactivating the RLC entity and/or logical channel in the packet. At most only one bit in MAC CE can be set to 1. Optionally, if all bits in the bitmap are set to 0, the PDCP duplication of the corresponding bearer is deactivated.

The following describes an embodiment of how to determine to which RLC entity the PDCP entity sends the PDCP PDU after PDCP is repeatedly deactivated (discussed separately for carrier aggregation and dual connectivity scenarios).

Taking the eighth to the embodiments as examples, the processing in the case of carrier aggregation will be described. In carrier aggregation, RLC entities and/or logical channels and/or RLC bearers associated with the same PDCP repeating bearer or its PDCP entity belong to the same cell group.

Embodiment 8 (After deactivating PDCP repeatedly, the PDCP entity sends the PDCP PDU to the main path)

In this embodiment, the UE receives an RRC message from the base station, and the RRC message carries a primary path indication information element (denoted as primaryPath). The main path indication information element may include a cell group indication information element cellGroup for indicating a cell group identification and/or a logical channel indication information element logicalChannel for indicating a logical channel identification). If the PDCP is repeatedly deactivated (for example, the repeated activation/deactivation MAC is received), the PDCP entity sends the PDCP PDU to the main path. In other words, even if the main path is deactivated before the PDCP is repeatedly deactivated, when the PDCP is repeatedly deactivated, the main path is activated and used by the PDCP entity to send PDCP PDUs. For example, when the MAC entity receives the repeated activation/deactivation MAC (or MAC switching CE), if the main path or the RLC entity or logical channel or RLC bearer indicated by the main path is deactivated, the MAC layer (MAC layer indicates the upper layer ) Activate the main path or the RLC entity or logical channel or RLC bearer indicated by the main path, and indicate that the upper layer PDCP is repeatedly deactivated; or, the MAC layer indicates that the upper layer PDCP is repeatedly deactivated, and the upper layer activates the main path or the RLC indicated by the main path Entity or logical channel or RLC bearer; or when the MAC entity receives repeated activation/deactivation MAC (or MAC switching CE), it instructs the upper layer to deactivate PDCP duplication and/or the corresponding RLC entity or logical channel identification defined by the main path RLC entity or logical channel or logical channel identification.

Embodiment 9 (After repeating the deactivation of PDCP, the PDCP entity sends the PDCP PDU to the activated RLC entity designated by the switch MAC CE)

In this embodiment, the UE receives the handover MAC CE from the base station. For example, the handover MAC indicates that the Di corresponding to the bearer DRB i (or SRB i) has a value of 0, that is, the PDCP is repeatedly deactivated.

Preferably, the MAC entity activates the RLC entity and/or logical channel and/or RLC bearer corresponding to the Lij value of 1 corresponding to DRB i (or SRB i), and instructs the upper layer to deactivate the PDCP repetition of the corresponding bearer; or, At the same time, the upper layer activates the RLC entity and/or logical channel and/or RLC bearer and/or logical channel identifier; or the upper layer activates the PDCP repeated and/or activated RLC entity. In this case, the corresponding Dij with a value of 0 has only one Lij with a value of 1.

Alternatively, when Di = 0, the corresponding Lij field is not included in the handover MAC CE, but the handover MAC CE contains a field used to indicate the deactivated RLC entity and/or logical channel after the PDCP is repeated. The value of the field is the logical channel identifier of the activated logical channel or the logical channel associated with the activated RLC entity.

Embodiment 10 (After the deactivation of the PDCP is repeated, the PDCP entity sends the PDCP PDU to the activated/deactivated PDCP repetitive MAC, and the logical channel identifier of the logical channel associated with the activated RLC entity is small (or larger or smallest or Maximum)

In this embodiment, when receiving a MAC for deactivating PDCP duplication (such as duplicate activation/deactivation MAC or CE switching MAC), if the PDCP of a bearer is repeatedly deactivated, the MAC entity receives The MAC performs at least one of the following operations during the CE:

A. Deactivate (or instruct upper layer to deactivate) RLC entities and/or RLC bearers associated with logical channels with larger (or smaller) logical channels, or deactivate logic with larger (or smaller) logical channels channel.

B. Deactivate (or instruct the upper layer to deactivate) the RLC entity and/or logical channel and/or RLC bearer corresponding to the bearer (or associated with the PDCP entity of the bearer), except for those with the largest (or smallest) logical channel identifier Either the RLC entity and/or RLC bearer associated with the largest (or smallest) logical channel identification or the logical channel with the largest (or smallest) logical channel identification is excluded. The maximum or minimum only considers the largest or smallest of the logical channel identifiers corresponding to the activated logical channel (or RLC entity).

C. Instruct the upper layer to deactivate PDCP repeat.

D. Instruct the upper layer to activate the logical channel with the largest (or smallest) logical channel identifier or to indicate the upper layer to activate the RLC entity or RLC bearer where the largest (or smallest) logical channel identifier is associated. The maximum or minimum only considers the largest or smallest of the logical channel identifiers corresponding to the activated logical channel (or RLC entity).

In this embodiment, after the PDCP of the predefined deactivation bearer is repeated, the PDCP entity sends the PDCP PDU to the RLC entity associated with the logical channel having the smallest (or largest) logical channel identifier. The maximum or minimum only considers the largest or smallest of the logical channel identifiers corresponding to the activated logical channel (or RLC entity). In the embodiment of the present disclosure, activating one RLC entity means that the PDCP entity sends the PDCP PDU to the RLC entity. Deactivating an RLC entity means that the PDCP entity no longer sends PDCP PDUs to the RLC entity.

Next, taking Example 11 to Example 13 as an example, the processing in the case of dual connection will be described.

In the dual link, RLC entities and/or logical channels and/or RLC bearers associated with the same PDCP-supporting bearer or its PDCP entity belong to different cell groups. For bearers configured with PDCP repetition (for example, the base station configures the user equipment through RRC messages), if the PDCP repetition is in the active state, the PDCP entity will copy the PDCP PDU and send it to its associated and activated RLC entity; if the PDCP repetition The deactivated and activated RLC entities belong to different cell groups and the total number is equal to or greater than the data separation threshold configured in the RRC message (for example, using the cell ulDataSplitThreshold indication), and sends the data (that is, PDCP PDU) to the master Path (in this disclosure, the primary path may also be referred to as the primary RLC entity) or the secondary RLC entity (or the activated secondary RLC entity); if the PDCP is repeatedly in the deactivated state and the activated RLC entity belongs to a different cell group and If the total amount of data is less than the data separation threshold configured in the RRC message (for example, using the cell ulDataSplitThreshold indication), the data (that is, PDCP PDU) is sent to the main path. This comparison is based on the total amount of data and the data separation threshold. If the total amount of data is less than the data separation threshold, the PDCP entity sends the PDCP PDU only to the main path. If the total amount of data is greater than or equal to the data separation threshold, then The PDCP entity sends PDCP PDUs to the main path and one of the other activated RLC entities. The data transmission method is called data separation. The main path may be defined in the manner described in other embodiments of the present disclosure.

Embodiment 11 (After repeating the deactivation of PDCP, the PDCP entity sends the PDCP PDU to the RLC entity used in the initial state)

In this embodiment, the rUE receives an RRC message from the base station, and the RRC message includes a configuration that supports PDCP repeat bearers. Specifically, the RRC message includes the configuration of the main path, and the configuration of the main path may include a cell group indicator (or a cell group indicator and a logical channel indicator), and the cell group indicator is used to indicate which The RLC entity and/or logical channel in the cell group may serve as the main path. If the main path configuration includes both the cell group indicator and the logical channel indicator, only the RLC entity (or the logical channel identifier is a logical channel) located in the cell indicated by the cell group indicator and associated with the logical channel indicated by the logical channel indicator The logical channel indicating the value of the ID) can be used as the main path.

When the UE receives the repeated MAC (ie repeated activation/deactivation MAC or CE switching MAC) CE for deactivating PDCP of a bearer from the base station, it performs one of the following operations:

A. The MAC entity instructs the upper layer to deactivate PDCP duplication. After receiving the PDCP duplication deactivation instruction, the PDCP entity uses data separation and uses RRC messages to activate the RLC entity and the main path to transmit data.

B. The MAC entity activates the RLC entity and/or logical channel activated in the RRC message and instructs the upper layer to deactivate PDCP repetition.

C. The MAC entity indicates the RLC entity and/or logical channel or logical channel identifier activated in the upper layer RRC message. Optionally, it also instructs the upper layer to deactivate the PDCP repetition.

Embodiment 12 (After the deactivation of PDCP is repeated, the PDCP entity sends the PDCP PDU to the activated RLC entity specified by the switch MAC CE)

In this embodiment, the MAC used to deactivate the PDCP duplication of the bearer carries the logical channel identification indication information, which is used to instruct the PDCP entity to send the PDCP PDU to the logical channel identification indication information indication after the deactivation of the PDCP duplication. RLC entity of the logical channel. For example, when the UE receives a duplicate MAC (such as repeated activation/deactivation MAC or CE switching MAC) CE of the PDCP used to deactivate a bearer from the base station, in the MAC CE, the value of Di corresponding to the bearer If it is 0, the MAC entity activates the RLC entity corresponding to the Lij value of 1 or the RLC entity and/or logical channel associated with the logical channel indicated by the logical channel identifier indication indicator and/or instructs the upper layer to deactivate PDCP repetition and/or to take Lij The logical channel identifier (or logical channel or RLC entity associated with the logical channel with the logical channel identifier) corresponding to the value 1 is indicated to the upper layer.

Embodiment 13 (After the deactivation of PDCP is repeated, the PDCP entity sends the PDCP PDU to the activated RLC entity)

In this embodiment, when receiving the MAC for deactivating PDCP duplication (for example, repeated activation/deactivation of MAC or CE switching), if there are only two RLC entities in the activated state, the PDCP entity follows the data separation method Send PDCP PDU to the activated RLC entity (that is, the activated RLC entity when receiving the deactivated PDCP repeated MAC) CE; if there are more than two activated RLC entities in a cell group, The RLC entity that predefines the logical channel identifier with the smallest (or largest) logical channel in the cell group or the logical channel associated with the smallest (or largest) logical channel identifier is used by the PDCP entity to send PDCP PDUs according to the data separation method. The maximum or minimum only considers the largest or smallest of the logical channel identifiers corresponding to the activated logical channel (or RLC entity).

Specifically, when the UE receives the PDCP repeated MAC from the base station to deactivate a bearer, the MAC entity performs at least one of the following operations:

A. For multiple activated RLC entities belonging to the same cell group, the MAC entity deactivates (or instructs the upper layer to deactivate) the RLC entity associated with the logical channel with a larger (or smaller or largest or smallest) logical channel identifier And/or RLC bearers, or deactivate logical channels with larger (or smaller or largest or smallest) logical channel identifiers.

B. For multiple activated RLC entities belonging to the same cell group, the MAC entity deactivates (or instructs the upper layer to deactivate) the RLC entity and/or logic corresponding to the bearer (or associated with the PDCP entity of the bearer) Except for channel and/or RLC bearers, except those with the largest (or smallest or larger or smaller) logical channel identifiers or associated with RLC entities and/or RLC with the largest (or smallest or larger or smaller) logical channel identifiers Except for carrying.

C. Instruct the upper layer to deactivate PDCP repeat.

D. For multiple activated RLC entities belonging to the same cell group, the MAC entity instructs the upper layer to activate the logical channel with the largest (or smallest or larger or smaller) logical channel identifier or indicates that the upper layer activation is associated with the largest ( Or the smallest or larger or smaller) logical channel identified RLC entity or RLC bearer.

The larger or smaller or the largest or the smallest described in this embodiment only considers the larger or the smaller or the largest or the smallest of the logical channel identifiers corresponding to the activated logical channel (or RLC entity).

In the embodiments of the present disclosure, the RLC entity and/or logical channel and/or RLC bearer in the activated state may also be referred to as the RLC entity and/or logical channel and/or RLC bearer that are activated or used to transmit data. If PDCP is repeatedly activated, the uplink UL MAC SDU from the activated RLC entity or logical channel can only be sent on the serving cell configured for it. The RLC entity and/or logical channel and/or RLC bearer in the activated state may be the RLC entity and/or logical channel and/or RLC bearer used for transmitting PDCP PDU after the PDCP is repeatedly activated or deactivated. The activated RLC entity and/or logical channel and/or RLC bearer refers to the RLC entity indicated in the RRC message (or the RLC entity in the activated state indicated in the RRC message) or the RLC entity indicated by the lower layer (or indicated by the lower layer Active RLC entity). In carrier aggregation, corresponding to a certain bearer, the main path in the present disclosure refers to the RLC entity (or RLC entity used to transmit PDCP PDU) to which the PDCP entity sends the PDCP PDU after the PDCP deactivation is repeated. In dual connectivity, for a certain bearer, the main path in the present disclosure refers to when the sum of the PDCP data volume and the RLC data volume to be initially transmitted with the associated (or associated and activated) RLC is less than the RRC message When the data separation threshold is configured in the PDCP entity, the RLC entity (or entity used to transmit PDCP PDUs) to which the data is sent. The upper layer RLC entity indicating in the embodiment of the present disclosure may also be expressed as indicating the upper layer logical channel or logical channel identifier. In this disclosure, it is stated that the activated RLC entity refers to an entity for sending PDCP PDUs. After an RLC entity is activated, the PDCP entity may send the PDCP PDU to the RLC entity. The deactivation RLC entity described in this disclosure may also be replaced with deactivation logical channels.

UE capability reporting

The UE receives the capability query message from the base station. The UE sends a capability report message to the base station, where the capability report message carries an information element, which is used to indicate the maximum number of RLC entities and/or logical channels that can be supported; or the information element is used to indicate that it can be activated simultaneously The maximum number of RLC entities and/or logical channels; or the information element is used to indicate that the PDCP entity can send duplicate PDCP PDUs to several RLC entities at most.

Duplicate PDU deletion

For PDCP entities configured with PDCP repetition, the PDCP sending entity performs the following operations:

If the associated RLC entity is switched (or receives an instruction from the lower layer switching RLC entity or receives a switching instruction from the lower layer), the deactivated RLC entity instructs to delete all duplicate PDCP data PDUs.

The deactivated RLC entity or logical channel or RLC bearer in the present disclosure means that the PDCP entity no longer sends PDCP PDUs to the deactivated RLC entity.

The computer-executable instructions or programs running on the device according to the present invention may be programs that cause the computer to realize the functions of the embodiments of the present invention by controlling a central processing unit (CPU). The program or information processed by the program may be temporarily stored in volatile memory (such as random access memory RAM), hard disk drive (HDD), non-volatile memory (such as flash memory), or other memory systems.

Computer-executable instructions or programs for implementing the functions of the embodiments of the present invention may be recorded on a computer-readable storage medium. The corresponding functions can be realized by causing the computer system to read the programs recorded on the recording medium and execute the programs. The so-called "computer system" here may be a computer system embedded in the device, and may include an operating system or hardware (such as a peripheral device). The “computer-readable storage medium” may be a semiconductor recording medium, an optical recording medium, a magnetic recording medium, a recording medium that dynamically stores a program for a short time, or any other recording medium readable by a computer.

Various features or functional modules of the device used in the above-described embodiments may be implemented or executed by circuits (for example, single-chip or multi-chip integrated circuits). Circuits designed to perform the functions described in this specification may include general-purpose processors, digital signal processors (DSPs), application specific integrated circuits (ASICs), field programmable gate arrays (FPGAs), or other programmable logic devices, discrete Gate or transistor logic, discrete hardware components, or any combination of the above devices. A general-purpose processor may be a microprocessor, or any existing processor, controller, microcontroller, or state machine. The above circuit may be a digital circuit or an analog circuit. When new integrated circuit technologies that replace existing integrated circuits appear due to advances in semiconductor technology, one or more embodiments of the present invention may also be implemented using these new integrated circuit technologies.

Furthermore, the present invention is not limited to the above-mentioned embodiment. Although various examples of the embodiments have been described, the present invention is not limited to this. Fixed or non-mobile electronic equipment installed indoors or outdoors can be used as terminal equipment or communication equipment, such as AV equipment, kitchen equipment, cleaning equipment, air conditioners, office equipment, vending machines, and other household appliances.

As above, the embodiments of the present invention have been described in detail with reference to the drawings. However, the specific structure is not limited to the above-mentioned embodiments, and the present invention also includes any design changes that do not deviate from the gist of the present invention. In addition, the present invention can be variously modified within the scope of the claims, and the embodiments obtained by appropriately combining the technical means disclosed in different embodiments are also included in the technical scope of the present invention. In addition, components having the same effect described in the above embodiments can be replaced with each other.

Claims

A method in user equipment UE includes:

Receive handover MAC from the base station; and

Based on the handover MAC CE, activate and/or deactivate RLC entities and/or logical channels associated with the bearer supporting the PDCP duplication.
The method according to claim 1, wherein

The handover MAC includes a first domain for indicating a bearer that supports the PDCP duplication, and a second domain of the radio link control RLC entity or logical channel associated with the bearer or the PDCP entity of the bearer.
The method according to claim 2, wherein

If the first field is set to Di, Di corresponds to the radio bearer i, where i is the corresponding sequence number according to the ascending or descending order of the radio bearer identifier of the radio bearer configured with the PDCP repeat, and the radio bearer Including data radio bearer DRB and/or signaling radio bearer SRB,

If the second domain is set to Lij, Lij means to activate or deactivate the jth RLC entity and/or logical channel of the radio bearer corresponding to the first domain Di, where j is the corresponding to the first domain Di The sequence numbers of the RLC entities and/or logical channels associated with the radio bearer are arranged in ascending or descending order according to the logical channel identifier,

According to the value of the second domain Lij, it is determined whether the RLC entity and/or the logical channel corresponding to the second domain Lij is activated or deactivated.
The method of claim 3, wherein

When the SRB supports dynamic switching of RLC entities or logical channels for data transmission, the DRB and the SRB use different switching MACs.
The method of claim 3, wherein

The handover MAC also includes the third domain,

When the SRB supports dynamic switching of RLC entities or logical channels for data transmission, the third field indicates whether the corresponding switching MAC is for the SRB or the DRB.
The method of claim 3, wherein

When the handover MAC is used to activate or deactivate the PDCP repetition, according to the value of the first domain Di, it is determined whether the radio bearer i corresponding to the first domain Di is in an activated state or a deactivated state .
The method according to claim 1, wherein

The RRC message includes group information, which is used to indicate an RLC entity group or logical channel group or RLC bearer group that can be used after the PDCP is repeatedly activated.
A user equipment, including:

Processor; and

Memory, storing instructions;

Wherein, when the instruction is executed by the processor, the method according to any one of claims 1 to 7 is executed.
A method in a base station, including:

Generating an RRC message, the RRC message containing information instructing the user equipment UE to perform a repeated activation configuration of the packet data aggregation protocol PDCP;

Sending the RRC message to the UE; and

A handover MACCE is generated and sent to the UE, and the handover MACCE indicates activation and/or deactivation of the RLC entity and/or logical channel associated with the bearer supporting the PDCP duplication.
A base station, including:

Processor; and

Memory, storing instructions;

Wherein, when the instruction is executed by the processor, the method according to claim 9 is executed.